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Patricia, I found this website that may give you some info on getting to Windsor Castle: http://www.windsor. gov.uk/transport/taxi.htm. From Windsor, you can take the train back to London (http://www.windsor.gov. uk/transport/train.htm).

Bearing in mind your short timeframe, and that you will be leaving from the hotel instead of directly from the LHR terminal, a taxi to Windsor and a train from Windsor to London would be your best choice. The bus Ben suggests does not serve the hotel so you have to to-and-fro to LHR to catch the bus.

Patricia, the website I gave you provided info on the taxi fare from Heathrow to Windsor:

For visitors arriving at Heathrow, it may be expensive to pick up a taxi outside the Airport so pre-book a taxi for a cheaper price. Approximate price for a taxi from Heathrow to Windsor is £45.00, a pre-booked taxi will cost approximately £20.00, depending on the time of day.